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Fixed in 2022.2.X

Votes

0

Found in

2019.4

2020.3

2020.3.12f1

2021.1

2021.2

2022.1

Issue ID

1347428

Regression

No

[Mobile] Performance spikes on specific devices when tapping the display rapidly

Input

-

Steps to reproduce:
1. Create an empty project
2. Check "Development Build" and "Autoconnect Profiler" options in Build Settings
3. Build and Run on a device
4. Open Profiler and connect it to profile the app running on the device
5. Tap the device screen rapidly

Expected results: There are no performance spikes in the Profiler
Actual results: Performance spikes appear in the Profiler triggered by rapid input on the device

Reproducible with: 2019.4.31f1, 2020.3.21f1, 2021.1.26f1, 2021.2.0b16, 2022.1.0a13

Reproducible on:
iPad 9.7" 6th gen (14.4) (spikes up more than 40ms)
VLNQA00331, Huawei P20 lite (ANE-LX1), Android 9, CPU: HiSilicon Kirin 659, GPU: Mali-T830 (hardly reacts to rapid input, sometimes spikes up to 66ms)

Not reproducible on:
iPhone XR (13.4.1) (hardly reacts to rapid input, sometimes spikes up to 37ms)
iPhone 8 Plus (14.4.2) (hardly reacts to rapid input, sometimes spikes up to 37ms)
iPad Air 2 (11.0.3) (rapid input seems to make the frames more stable)
VLNQA00285, Samsung Galaxy J4 Core (SM-J410F), Android 8.1.0, CPU: Snapdragon 425 MSM8917, GPU: Adreno (TM) 308 (hardly reacts to rapid input, sometimes spikes up to 37ms)
VLNQA00321, Xiaomi MI 9 (MI 9), Android 10, CPU: Snapdragon 855 SM8150, GPU: Adreno (TM) 640
VLNQA00122, Samsung Galaxy S9 (SM-G960F), Android 10, CPU: Snapdragon 855 SM8150, GPU: Mali-G72
VLNQA00013 - Galaxy S6 Edge+ (SM-G928F), OS: 7.0.0, CPU: Exynos 7 Octa (7420), GPU: Mali-T760

Notes:
- At idle the app seems to float around 33ms, when rapidly tapping the screen can spike to 37ms, however, on the devices deemed reproducible the spikes go over 40ms
- When reproducing the issue this error is printed in Xcode:
"Gesture: Failed to receive system gesture state notification before next touch"

  1. Resolution Note (fix version 2022.2):

    Fixed in: 2022.2.0a1

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